biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 44:361-366, 2001 | DOI: 10.1023/A:1012486509219

The Effect of Metabolic Inhibitors, Sugars and Fusicoccin on the Electrical Potential Difference Arising Across an Intact Chenopodium Rubrum L. Plant

B. Živanović1, M. Vuletić2, Z. Vučinić1
1 Center for Multidisciplinary Studies, University of Belgrade, Belgrade, Yugoslavia
2 Maize Research Institute, Belgrade, Yugoslavia

An analysis of the effect of metabolic inhibitors, sugars, and fusicoccin on the trans-plant electrical potential difference arising across one-week-old green or herbicide-treated Chenopodium rubrum L. plants was performed. The substances were applied either to the solution bathing the root or in the form of drops to the stem. The respiratory inhibitors (KCN and salicylhydroxamic acid), sulfhydryl agents (N-ethylmaleimide and p-chloromercuribenzene sulfonic acid) and proton ionophore (carbonyl cyanide m-chlorophenylhydrazone) affected the electrical potential, the kinetics of the induced changes varying with different inhibitors and site of application. None of the applied sugars (sucrose, glucose or sorbitol), ATPase stimulator fusicoccin or inhibitor vanadate exerted any appreciable effect on the electrical potential. An effect of sucrose could be observed in the case of its application immediately following de-rooting, especially in the case of herbicide-treated plants. These results we explain by non-participation of the sucrose transporter or the proton ATPase in the generation of the electrical potential difference across intact plants (apoplast-apoplast configuration).

Keywords: apoplast; ion transport; respiration; symplast
Subjects: apoplast, electrical potential difference; Chenopodium rubrum; electrical potential difference, metabolic inhibitors; fusicoccin, electrical potential difference across intact plant; ion transport, electrical potential difference accross intact plant; potential difference across intact plant, fusicoccin; respiration inhibitors; symplast, electrical potential difference accross intact plant

Published: September 1, 2001  Show citation

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Živanović, B., Vuletić, M., & Vučinić, Z. (2001). The Effect of Metabolic Inhibitors, Sugars and Fusicoccin on the Electrical Potential Difference Arising Across an Intact Chenopodium Rubrum L. Plant. Biologia plantarum, 44(3), 361-366. doi: 10.1023/A:1012486509219
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